<template>
    <div>
        <div class="shopcart">
            <div class="content" @click="toggleList">
                <div class="content-left">
                    <div class="logo-wrapper">
                        <div class="logo" :class="{ heightlight: totalCount > 0 }"><i class="icon-shopping_cart" :class="{ heightlight: totalCount > 0 }"></i></div>
                        <div class="num" v-show="totalCount > 0">{{ totalCount }}</div>
                    </div>
                    <div class="price" :class="{ heightlight: totalCount > 0 }">￥{{ totalPrice }}</div>
                    <div class="desc">另需配送费￥{{ deliveryPrice }}元</div>
                </div>
                <div class="content-right" @click.stop.prevent="pay()">
                    <div class="pay" :class="payClass">{{ payDesc }}</div>
                </div>
            </div>
            <div class="ball-container">
                <div transition="drop" v-for="ball in balls" v-show="ball.show" class="ball"><div class="inner"></div></div>
            </div>
            <transition name="slide-fade">
                <div class="shopcart-list" v-show="slidfade">
                    <div class="shopcart-list-content">
                        <div class="list-header">
                            <h1 class="title">购物车</h1>
                            <span class="empty" @click="empty()">清空</span>
                        </div>
                        <div class="list-content" ref="listContent">
                            <ul>
                                <li class="food" v-for="food in selectFoods">
                                    <span class="name">{{ food.name }}</span>
                                    <div class="price">
                                        <span>￥{{ food.price * food.count }}</span>
                                    </div>
                                    <div class="cartcontrol-wrapper"><cartcontrol :food="food"></cartcontrol></div>
                                </li>
                            </ul>
                        </div>
                    </div>
                </div>
            </transition>
        </div>
        <transition name="fade"><div class="list-mask" v-show="slidfade" @click="toggleList()"></div></transition>
    </div>
</template>

<script type="text/ecmascript-6">
import cartcontrol from '../cartcontrol/cartcontrol.vue';
import BScroll from 'better-scroll';
export default {
  props:{
      selectFoods:{
        type:Array,
        default(){
            return [{
                price:30,
                count:1
            }];
        }
      },
      deliveryPrice:{
          type:Number,
          default:0
      },
      minPrice:{
          type:Number,
          default:0
      }
  },
  data(){
      return {
          balls:[{
              show:false
          }],balls:[{
              show:false
          }],balls:[{
              show:false
          }],balls:[{
              show:false
          }],balls:[{
              show:false
          }],
          slidfade:false
      }
  },
  computed:{
      totalPrice(){
          let total = 0;
          this.selectFoods.forEach((food) => {
              total +=food.price*food.count;
          });
          return total;
      },
      totalCount(){
          let count = 0;
          this.selectFoods.forEach((food) => {
              count +=food.count;
          });
          if(!count){
              this.slidfade=false;
          }
          return count;
      },
      payDesc(){
          if(this.totalPrice===0){
              return `￥${this.minPrice}元起送`;
          }else if(this.totalPrice<this.minPrice){
              let diff = this.minPrice-this.totalPrice;
              return `还差￥${diff}元起送`;
          }else{
              return '去结算';
          }
      },
      payClass(){
          if(this.totalPrice<this.minPrice){
              return 'not-enough';
          }else{
              return 'enough';
          }
      }

  },
  components:{
      cartcontrol
  },
  methods:{
      toggleList(){
          if (!this.totalCount){
              return;
          }
          this.slidfade=!this.slidfade;
          this._scroll();
      },
      _scroll(){
          if(this.slidfade){
              this.$nextTick(() => {
                  if(!this.scroll){
                      this.scroll = new BScroll(this.$refs.listContent,{
                          click:true
                      });
                  }else{
                      this.scroll.refresh();
                  }
              });
          }
      },
      empty(){
          this.selectFoods.forEach((food) => {
             food.count = 0;
          })
      },
      pay(){
          if(this.totalPrice<this.minPrice){
              return;
          }
          window.alert(`支付${this.totalPrice}元`);
      }
  }
};
</script>

<style lang="stylus" rel="stylesheet/stylus">
@import '../../common/stylus/mixin.styl'

.shopcart
    position fixed
    left 0
    bottom 0
    z-index 50
    width 100%
    height 48px
    .content
        display flex
        background #141d27
        color rgba(255, 255, 255, 0.4)
        .content-left
            flex 1
            .logo-wrapper
                display inline-block
                position relative
                top -10px
                margin 0 12px
                padding 6px
                width 56px
                height 56px
                box-sizing border-box
                vertical-align top
                border-radius 50%
                background #141D27
                .logo
                    width 100%
                    height 100%
                    border-radius 50%
                    text-align center
                    background #2b343c
                    &.heightlight
                        background rgb(0, 160, 220)
                    .icon-shopping_cart
                        line-height 44px
                        font-size 24px
                        color #80858a
                        &.heightlight
                            color #fff
                .num
                    position absolute
                    top 0
                    right 0
                    width 24px
                    height 16px
                    line-height 16px
                    text-align center
                    border-radius 16px
                    font-size 9px
                    font-weight 700
                    color #fff
                    background rgb(240, 20, 20)
                    box-shadow 0 4px 8px 0 rgba(0, 0, 0, 0.4)
            .price
                display inline-block
                vertical-align top
                margin-top 12px
                line-height 24px
                padding-right 12px
                box-sizing border-box
                border-right 1px solid rgba(255, 255, 255, 0.1)
                font-size 16px
                font-weight 700
                &.heightlight
                    color #fff
            .desc
                display inline-block
                vertical-align top
                line-height 24px
                margin 12px 0 0 12px
                font-size 10px
        .content-right
            flex 0 0 105px
            width 105px
            .pay
                height 48px
                line-height 48px
                text-align center
                font-size 12px
                font-weight 700
                background #2b333b
                &.not-enough
                    background #2B333B
                &.enough
                    background #00b43c
                    color #fff
    .slide-fade-enter-active
        transition all 0.3s ease
    .slide-fade-leave-active
        transition all 0.8s cubic-bezier(1, 0.5, 0.8, 1)
    .slide-fade-enter, .slide-fade-leave-to
        transform translateY(100%)
    .shopcart-list
        position absolute
        left 0
        top 0
        z-index -1
        width 100%
        .shopcart-list-content
            transform translate3d(0, -100%, 0)
            .list-header
                height 40px
                line-height 40px
                padding 0 18px
                background #f3f5f7
                border-bottom 1px solid rgba(7, 17, 27, 0.1)
                .title
                    float left
                    font-size 14px
                    color rgb(7, 17, 27)
                .empty
                    float right
                    font-size 12px
                    color rgb(0, 160, 220)
            .list-content
                padding 0 18px
                max-height 217px
                overflow hidden
                background #fff
                .food
                    position relative
                    padding 12px
                    box-sizing border-box
                    border-1px(rgba(7, 17, 27, 0.1))
                    .name
                        line-height 24px
                        font-size 14px
                        color rgb(7, 17, 2 7)
                    .price
                        position absolute
                        right 98px
                        bottom 12px
                        line-height 24px
                        font-weight 700
                        font-size 14px
                        color rgb(240, 20, 20)
                    .cartcontrol-wrapper
                        position absolute
                        right 0
                        bottom 5px
.fade-enter-active, .fade-leave-active
    transition: opacity .8s
.fade-enter, .fade-leave-to
    opacity: 0                        
.list-mask
    position fixed
    top 0
    left 0
    width 100%
    height 100%
    z-index 40
    background rgba(7, 17, 27, 0.6)
    backdrop-filter blur(10px)
</style>
